{"id":31226,"date":"2026-06-20T08:00:00","date_gmt":"2026-06-20T00:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=31226"},"modified":"2026-06-18T17:53:14","modified_gmt":"2026-06-18T09:53:14","slug":"vps-site-migration-zero-downtime","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/vps-%e6%8a%80%e6%9c%af\/vps-site-migration-zero-downtime\/","title":{"rendered":"VPS \u7ad9\u70b9\u8fc1\u79fb\u96f6\u505c\u673a\u65b9\u6848\uff1a\u4ece DNS \u5207\u6362\u5230\u6570\u636e\u540c\u6b65\u7684\u5168\u6d41\u7a0b"},"content":{"rendered":"<p>\u5982\u4f55\u5728\u8fc1\u79fb\u5230\u65b0 VPS \u65f6\u505a\u5230\u96f6\u505c\u673a\uff1f\u8fd9\u662f\u6bcf\u4e2a\u7ad9\u957f\u5728\u670d\u52a1\u5668\u5207\u6362\u524d\u6700\u5173\u5fc3\u7684\u95ee\u9898\u3002\u54ea\u6015\u53ea\u5b95\u673a\u5341\u51e0\u5206\u949f\uff0c\u641c\u7d22\u5f15\u64ce\u6293\u53d6\u5931\u8d25\u3001\u7528\u6237\u770b\u5230\u9519\u8bef\u9875\u9762\u3001\u8ba2\u5355\u6570\u636e\u4e22\u5931\u2014\u2014\u8fd9\u4e9b\u635f\u5931\u5f80\u5f80\u6bd4\u8fc1\u79fb\u672c\u8eab\u66f4\u5927\u3002\u96f6\u505c\u673a\u8fc1\u79fb\u7684\u6838\u5fc3\u601d\u8def\uff0c\u5c31\u662f\u5728\u65e7\u670d\u52a1\u5668\u7ee7\u7eed\u670d\u52a1\u7684\u540c\u65f6\uff0c\u628a\u6570\u636e\u5b8c\u6574\u540c\u6b65\u5230\u65b0\u670d\u52a1\u5668\uff0c\u6700\u540e\u901a\u8fc7 DNS \u5e73\u6ed1\u5207\u6362\uff0c\u8ba9\u8bbf\u95ee\u8005\u51e0\u4e4e\u611f\u77e5\u4e0d\u5230\u540e\u53f0\u53d1\u751f\u4e86\u4ec0\u4e48\u3002<\/p>\n<h2>\u8fc1\u79fb\u524d\u7684\u51c6\u5907\u5de5\u4f5c<\/h2>\n<h3>\u6478\u6e05\u7ad9\u70b9\u73b0\u72b6<\/h3>\n<p>\u52a8\u624b\u4e4b\u524d\uff0c\u5148\u641e\u6e05\u695a\u5f53\u524d\u7ad9\u70b9\u7684\u89c4\u6a21\u548c\u4f9d\u8d56\u3002\u767b\u5f55\u73b0\u6709\u670d\u52a1\u5668\uff0c\u67e5\u770b\u7f51\u7ad9\u6587\u4ef6\u603b\u5927\u5c0f\u3001\u6570\u636e\u5e93\u5927\u5c0f\u4ee5\u53ca\u8fd1 7 \u5929\u4fee\u6539\u7684\u6587\u4ef6\u6570\u91cf\u3002\u8fd9\u4e9b\u6570\u5b57\u51b3\u5b9a\u4e86\u540c\u6b65\u7b56\u7565\uff1a\u6587\u4ef6\u603b\u91cf\u5c0f\u4e8e 50GB \u7528 rsync \u901a\u5e38\u591f\u7528\uff1b\u6570\u636e\u5e93\u8d85\u8fc7 10GB \u8981\u8003\u8651\u4e3b\u4ece\u590d\u5236\u66ff\u4ee3 mysqldump\u3002\u53e6\u5916\u522b\u5fd8\u4e86\u68c0\u67e5\u662f\u5426\u6709 cron job\u3001\u540e\u53f0\u961f\u5217\u8fdb\u7a0b\u3001\u90ae\u4ef6\u670d\u52a1\u7b49\u9690\u6027\u4f9d\u8d56\u3002\u5173\u4e8e<a href=\"https:\/\/cn.hostease.com\/blog\/vps-building-website-guide\/\" class=\"broken_link\">VPS \u5efa\u7ad9\u4e0e\u914d\u7f6e<\/a>\u7684\u66f4\u591a\u7ec6\u8282\uff0c\u53ef\u4ee5\u53c2\u8003\u6211\u4eec\u7684\u4e13\u9898\u6587\u7ae0\u3002<\/p>\n<h3>\u63d0\u524d\u964d\u4f4e DNS TTL<\/h3>\n<p>\u8fd9\u662f\u96f6\u505c\u673a\u7684\u5173\u952e\u524d\u7f6e\u64cd\u4f5c\u3002\u5927\u591a\u6570\u57df\u540d\u9ed8\u8ba4 TTL\uff08\u751f\u5b58\u65f6\u95f4\uff09\u4e3a 3600 \u79d2\u751a\u81f3 86400 \u79d2\uff0c\u610f\u5473\u7740 DNS \u53d8\u66f4\u540e\u9700\u8981 1-24 \u5c0f\u65f6\u624d\u80fd\u5168\u7403\u751f\u6548\u3002\u5728\u8fc1\u79fb\u524d 24-48 \u5c0f\u65f6\uff0c\u628a TTL \u964d\u5230 300 \u79d2\uff085 \u5206\u949f\uff09\uff0c\u8fd9\u6837\u6700\u7ec8\u5207\u6362\u65f6 DNS \u751f\u6548\u7a97\u53e3\u4f1a\u4ece\u51e0\u5c0f\u65f6\u538b\u7f29\u5230\u51e0\u5206\u949f\u3002\u5728\u57df\u540d\u6ce8\u518c\u5546\u7684 DNS \u7ba1\u7406\u9762\u677f\u4e2d\uff0c\u627e\u5230 TTL \u8bbe\u7f6e\u9879\uff0c\u5c06\u6240\u6709 A \u8bb0\u5f55\u548c CNAME \u8bb0\u5f55\u7684 TTL \u6539\u4e3a 300\u3002<\/p>\n<h3>\u65b0 VPS \u73af\u5883\u642d\u5efa<\/h3>\n<p>\u5728\u65b0\u670d\u52a1\u5668\u4e0a\u642d\u5efa\u4e0e\u65e7\u73af\u5883\u4e00\u81f4\u7684\u8fd0\u884c\u73af\u5883\uff1a\u64cd\u4f5c\u7cfb\u7edf\u7248\u672c\u4fdd\u6301\u4e00\u81f4\uff0cWeb \u670d\u52a1\u5668\u7248\u672c\u5339\u914d\uff08Nginx \u6216 Apache\uff09\uff0cPHP \u7248\u672c\u548c\u6269\u5c55\u4fdd\u6301\u540c\u6b65\uff0c\u6570\u636e\u5e93\u7248\u672c\u4e00\u81f4\u3002\u914d\u7f6e\u597d\u57df\u540d\u7684\u865a\u62df\u4e3b\u673a\u3001\u7533\u8bf7 SSL \u8bc1\u4e66\uff08\u63a8\u8350\u7528 Let&#8217;s Encrypt \u7684 certbot \u6a21\u5f0f\u5728\u5207\u6362\u524d\u9884\u7b7e\uff09\uff0c\u7136\u540e\u7528 hosts \u6587\u4ef6\u4e34\u65f6\u7ed1\u5b9a\u57df\u540d\u5230\u65b0 IP \u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n<p>\u5728\u5f00\u59cb\u6570\u636e\u540c\u6b65\u4e4b\u524d\uff0c\u8fd8\u9700\u8981\u5728\u65b0\u670d\u52a1\u5668\u4e0a\u5b8c\u6210\u9632\u706b\u5899\u914d\u7f6e\u548c\u5b89\u5168\u52a0\u56fa\u3002\u786e\u4fdd SSH \u7aef\u53e3\u5df2\u4fee\u6539\u3001fail2ban \u5df2\u5b89\u88c5\u3001\u5fc5\u8981\u7684\u7aef\u53e3\u5df2\u5f00\u653e\u3002\u5173\u4e8e<a href=\"https:\/\/cn.hostease.com\/blog\/vps-firewall-setup\/\" class=\"broken_link\">VPS \u9632\u706b\u5899\u914d\u7f6e<\/a>\uff0c\u53ef\u4ee5\u53c2\u8003\u6211\u4eec\u7684\u8be6\u7ec6\u6559\u7a0b\u3002\u540c\u6b65\u8fc7\u7a0b\u4e2d\u5efa\u8bae\u4f7f\u7528 screen \u6216 tmux \u4fdd\u6301\u4f1a\u8bdd\uff0c\u907f\u514d\u56e0 SSH \u65ad\u5f00\u5bfc\u81f4\u540c\u6b65\u4e2d\u65ad\u3002<\/p>\n<h2>\u6570\u636e\u540c\u6b65\uff1a\u4e24\u9636\u6bb5\u8fc1\u79fb\u6cd5<\/h2>\n<p>\u96f6\u505c\u673a\u7684\u6838\u5fc3\u6280\u5de7\u662f\u300c\u4e24\u9636\u6bb5\u540c\u6b65\u300d\u2014\u2014\u5148\u505a\u4e00\u6b21\u5168\u91cf\u540c\u6b65\u628a\u5927\u90e8\u5206\u6570\u636e\u642c\u8fc7\u53bb\uff0c\u5207\u6362\u524d\u518d\u505a\u4e00\u6b21\u589e\u91cf\u540c\u6b65\u8865\u9f50\u5dee\u5f02\u3002\u8fd9\u6837\u6700\u7ec8\u5207\u6362\u65f6\u53ea\u9700\u8981\u540c\u6b65\u5c11\u91cf\u53d8\u66f4\u6570\u636e\uff0c\u505c\u673a\u7a97\u53e3\u88ab\u538b\u7f29\u5230\u6700\u77ed\u3002<\/p>\n<h3>\u6587\u4ef6\u540c\u6b65\uff1arsync \u589e\u91cf\u65b9\u6848<\/h3>\n<p>rsync \u662f Linux \u4e0b\u6700\u5e38\u7528\u7684\u6587\u4ef6\u540c\u6b65\u5de5\u5177\uff0c\u5b83\u53ea\u4f20\u8f93\u6e90\u548c\u76ee\u6807\u4e4b\u95f4\u7684\u5dee\u5f02\u90e8\u5206\uff0c\u975e\u5e38\u9002\u5408\u5927\u6587\u4ef6\u91cf\u7684\u589e\u91cf\u8fc1\u79fb\u3002\u8fc1\u79fb\u524d 24 \u5c0f\u65f6\u6267\u884c\u521d\u59cb\u5168\u91cf\u540c\u6b65\uff0c\u6392\u9664\u7f13\u5b58\u548c\u65e5\u5fd7\u76ee\u5f55\uff1b\u5207\u6362\u524d 10 \u5206\u949f\u518d\u6267\u884c\u4e00\u6b21\u5e26 <code>--delete<\/code> \u53c2\u6570\u7684\u589e\u91cf\u540c\u6b65\uff0c\u786e\u4fdd\u4e24\u7aef\u5b8c\u5168\u4e00\u81f4\u3002\u5982\u679c\u4f60\u7684\u7ad9\u70b9\u6709\u7528\u6237\u4e0a\u4f20\u76ee\u5f55\uff0c\u8bb0\u5f97\u5728\u6392\u9664\u5217\u8868\u4e2d\u53bb\u6389\u5b83\u3002<\/p>\n<h3>\u6570\u636e\u5e93\u540c\u6b65<\/h3>\n<p>\u6570\u636e\u5e93\u540c\u6b65\u9700\u8981\u77ed\u6682\u9501\u8868\u6765\u4fdd\u8bc1\u4e00\u81f4\u6027\u3002\u5bf9\u4e8e MySQL\/MariaDB\uff0c\u4f7f\u7528 mysqldump \u5bfc\u51fa\u65f6\u52a0\u4e0a <code>--single-transaction<\/code> \u53c2\u6570\uff0c\u5b83\u4f1a\u5728\u4e00\u4e2a\u4e8b\u52a1\u5185\u5b8c\u6210\u5bfc\u51fa\uff0cInnoDB \u5f15\u64ce\u4e0d\u4f1a\u9501\u8868\u3002\u5207\u6362\u524d\u5efa\u8bae\u5728\u65e7\u7ad9\u70b9\u77ed\u6682\u5f00\u542f\u7ef4\u62a4\u6a21\u5f0f\uff0c\u5bfc\u51fa\u6700\u65b0\u6570\u636e\u540e\u7acb\u5373\u6062\u590d\u3002\u5bf9\u4e8e\u5927\u591a\u6570\u4e2d\u5c0f\u578b\u7ad9\u70b9\uff0c\u8fd9\u4e2a\u7a97\u53e3\u7528\u6237\u51e0\u4e4e\u611f\u77e5\u4e0d\u5230\u3002\u5982\u679c\u4f60\u9700\u8981<a href=\"https:\/\/cn.hostease.com\/blog\/vps-high-availability\/\" class=\"broken_link\">VPS \u9ad8\u53ef\u7528\u67b6\u6784<\/a>\u65b9\u9762\u7684\u6307\u5bfc\uff0c\u53ef\u4ee5\u53c2\u8003\u6211\u4eec\u7684\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n<h3>\u52a8\u6001\u5185\u5bb9\u7ad9\u70b9\u7684\u989d\u5916\u5904\u7406<\/h3>\n<p>\u5982\u679c\u4f60\u7684\u7ad9\u70b9\u6709\u7528\u6237\u6ce8\u518c\u3001\u8bc4\u8bba\u3001\u8ba2\u5355\u7b49\u52a8\u6001\u529f\u80fd\uff0c\u6570\u636e\u540c\u6b65\u65f6\u8fd8\u8981\u6ce8\u610f\uff1a\u7528\u6237\u4f1a\u8bdd\u6570\u636e\u9ed8\u8ba4\u5b58\u5728\u672c\u5730 \/tmp\/ \u76ee\u5f55\uff0c\u8fc1\u79fb\u540e\u7528\u6237\u4f1a\u88ab\u8feb\u91cd\u65b0\u767b\u5f55\uff0c\u8fd9\u5c5e\u4e8e\u6b63\u5e38\u73b0\u8c61\u3002\u7528 crontab -l \u5bfc\u51fa\u65e7\u670d\u52a1\u5668\u7684\u5b9a\u65f6\u4efb\u52a1\uff0c\u5728\u65b0\u670d\u52a1\u5668\u5bfc\u5165\u3002\u5982\u679c\u65e7\u670d\u52a1\u5668\u8dd1\u4e86\u90ae\u4ef6\u670d\u52a1\uff0c\u786e\u4fdd\u90ae\u4ef6\u961f\u5217\u5728\u5207\u6362\u524d\u5df2\u6e05\u7a7a\u3002\u5bf9\u4e8e WordPress \u7ad9\u70b9\uff0c\u8fc1\u79fb\u540e\u8bb0\u5f97\u66f4\u65b0 wp-config.php \u4e2d\u7684\u6570\u636e\u5e93\u8fde\u63a5\u4fe1\u606f\uff0c\u5e76\u5728\u540e\u53f0\u6267\u884c\u4e00\u6b21\u300c\u6c38\u4e45\u94fe\u63a5\u300d\u4fdd\u5b58\u64cd\u4f5c\u4ee5\u5237\u65b0 rewrite \u89c4\u5219\u3002<\/p>\n<h2>DNS \u5207\u6362\u4e0e\u9a8c\u8bc1<\/h2>\n<h3>\u6267\u884c DNS \u5207\u6362<\/h3>\n<p>\u786e\u8ba4\u65b0\u670d\u52a1\u5668\u7ad9\u70b9\u901a\u8fc7 hosts \u7ed1\u5b9a\u6d4b\u8bd5\u6b63\u5e38\u3001\u6700\u65b0\u589e\u91cf\u6570\u636e\u540c\u6b65\u5df2\u5b8c\u6210\u3001SSL \u8bc1\u4e66\u5df2\u5728\u65b0\u670d\u52a1\u5668\u751f\u6548\u540e\uff0c\u5728\u57df\u540d\u6ce8\u518c\u5546\u540e\u53f0\u5c06 A \u8bb0\u5f55\u4ece\u65e7\u670d\u52a1\u5668 IP \u6539\u4e3a\u65b0\u670d\u52a1\u5668 IP\u3002\u7531\u4e8e\u63d0\u524d\u628a TTL \u964d\u5230\u4e86 300 \u79d2\uff0c\u5168\u7403 DNS \u8282\u70b9\u4f1a\u5728 5 \u5206\u949f\u5185\u66f4\u65b0\u3002\u5207\u6362\u65f6\u95f4\u5efa\u8bae\u9009\u5728\u8bbf\u95ee\u91cf\u6700\u4f4e\u7684\u51cc\u6668 2-4 \u70b9\u3002<\/p>\n<h3>\u5207\u6362\u540e\u9a8c\u8bc1\u6e05\u5355<\/h3>\n<p>DNS \u4fee\u6539\u540e\uff0c\u7acb\u5373\u5728\u65b0\u670d\u52a1\u5668\u4e0a\u76d1\u63a7\u8bbf\u95ee\u65e5\u5fd7\u786e\u8ba4\u8bf7\u6c42\u5f00\u59cb\u8fdb\u6765\u3002\u540c\u65f6\u7528 dig \u547d\u4ee4\u4ece\u4e0d\u540c\u7684\u516c\u5171 DNS \u670d\u52a1\u5668\uff08\u5982 8.8.8.8\u30011.1.1.1\u3001114.114.114.114\uff09\u67e5\u8be2\u57df\u540d\u89e3\u6790\u7ed3\u679c\uff0c\u786e\u8ba4\u5df2\u6307\u5411\u65b0 IP\u3002\u5b8c\u6574\u7684\u9a8c\u8bc1\u6e05\u5355\u5305\u62ec\uff1a\u9996\u9875\u548c\u6838\u5fc3\u9875\u9762\u80fd\u6b63\u5e38\u52a0\u8f7d\uff0c\u8868\u5355\u63d0\u4ea4\u3001\u641c\u7d22\u3001\u767b\u5f55\u7b49\u4ea4\u4e92\u529f\u80fd\u6b63\u5e38\uff0cSSL \u8bc1\u4e66\u663e\u793a\u6709\u6548\uff0c\u6570\u636e\u5e93\u8bfb\u5199\u6b63\u5e38\uff0ccron job \u5728\u65b0\u670d\u52a1\u5668\u6309\u9884\u671f\u6267\u884c\uff0c\u65e7\u670d\u52a1\u5668\u7684\u65e5\u5fd7\u663e\u793a\u8bf7\u6c42\u91cf\u5f52\u96f6\u3002<\/p>\n<h3>\u4fdd\u7559\u65e7\u670d\u52a1\u5668<\/h3>\n<p>\u5207\u6362\u5b8c\u6210\u540e\uff0c\u4e0d\u8981\u6025\u7740\u91ca\u653e\u65e7\u670d\u52a1\u5668\u3002\u5efa\u8bae\u4fdd\u7559 7 \u5929\uff0c\u786e\u8ba4\u641c\u7d22\u5f15\u64ce\u5df2\u91cd\u65b0\u6293\u53d6\u3001\u6240\u6709 CDN \u8282\u70b9\u7f13\u5b58\u5df2\u8fc7\u671f\u3001\u7528\u6237\u6ca1\u6709\u62a5\u544a\u5f02\u5e38\u540e\u518d\u5173\u95ed\u3002\u8fd9\u671f\u95f4\u65e7\u670d\u52a1\u5668\u53ef\u4ee5\u5f00\u542f\u7ef4\u62a4\u6a21\u5f0f\uff0c\u907f\u514d\u6570\u636e\u5206\u6b67\u3002<\/p>\n<h2>\u5e38\u89c1\u95ee\u9898\u4e0e\u56de\u6eda\u65b9\u6848<\/h2>\n<p>\u5982\u679c\u90e8\u5206\u7528\u6237\u53cd\u9988\u770b\u5230\u65e7\u5185\u5bb9\uff0c\u5927\u6982\u7387\u662f DNS \u7f13\u5b58\u672a\u8fc7\u671f\uff0c\u5efa\u8bae\u7528\u6237\u6e05\u7a7a\u672c\u5730 DNS 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